EP1026774A2 - Antenna for wireless operated communication terminals - Google Patents

Antenna for wireless operated communication terminals Download PDF

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Publication number
EP1026774A2
EP1026774A2 EP00100923A EP00100923A EP1026774A2 EP 1026774 A2 EP1026774 A2 EP 1026774A2 EP 00100923 A EP00100923 A EP 00100923A EP 00100923 A EP00100923 A EP 00100923A EP 1026774 A2 EP1026774 A2 EP 1026774A2
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EP
European Patent Office
Prior art keywords
antenna
antenna according
ground
frequency
connections
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP00100923A
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German (de)
French (fr)
Other versions
EP1026774A3 (en
Inventor
Martin Dr. Weinberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gigaset Communications GmbH
Original Assignee
Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1026774A2 publication Critical patent/EP1026774A2/en
Publication of EP1026774A3 publication Critical patent/EP1026774A3/en
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0471—Non-planar, stepped or wedge-shaped patch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element

Definitions

  • the present invention relates to antennas for radio-operated Communication terminals.
  • antennas are needed, which are able are to cover several frequency bands at the same time.
  • market is asking for smaller and cheaper ones Mobile devices. That is why antennas are required, some have a small footprint, easily for a function in several frequency bands or a broadband frequency range can be designed and manufactured cheaply.
  • the object of the present invention is to provide an antenna for to specify radio-operated communication terminals, which as planar inverted-F antenna is formed, but which in is able to cover several frequency bands at the same time.
  • An antenna for radio-operated communication terminals for Solution to the problem according to the invention is characterized by a planar inverted-F antenna with at the feed point and one or several earth connections, in their total dimension the size determining the antenna for a given lower Emission frequency is designed, and the one in the longitudinal direction or has several notches or gradations, by means of which result in one or more geometric lines, which consist of several straight or curved single sections put together, and that from the feed point or one other corner or end point to one of the through the notches or gradations created corner points, and over the course of which an emittable wave with a higher Frequency forms as the predetermined lower frequency.
  • the antenna according to the invention is easy and inexpensive to manufacture, requires little space and is easy for a function in several frequency bands or in one broadband frequency range can be designed.
  • Figure 1 shows a basic perspective view of a possible embodiment of the antenna according to the invention.
  • the actual radiating element of the multiband antenna according to the present invention is identified by 1, which is a planar inverted-F antenna. Only part of the housing wall of the mobile radio device 2 is shown, which is covered with a metallic EMC shield 3. In the present multiband antenna, this metallic EMC shield 3 forms the mass necessary for the radiator element 1. The connection between the radiator element 1 and the metallic EMC shield 3 is established via the ground connection 5. The actual feed point of the antenna is marked with 4.
  • FIGS. 2a to 2k show a small sample selection of differently designed radiator elements. This Selection is by no means restrictive. With all shown Examples are basically a planar inverted-F antenna according to claim 1.
  • FIG. 3 shows an embodiment of an inventive Multi-band antenna, in which, in contrast to that in FIG. 1 Multiband antenna shown an additional separate ground plate 6 is provided. Because under normal circumstances Mass ratios within a radio-operated communication terminal are not always fully predictable Mass plate 6 for defined mass ratios with respect to the radiator element 1 of the multi-band antenna. Between the ground plate 6 and the device ground are one or more connections 7 provided. These connections can also be extensive be executed.
  • the ground plate 8 need not, as shown in Figure 4, with regard to their dimensions according to the dimensions of the radiator element 9 straighten.
  • ground plate 10 in its outer Adapt dimensions to the respective radiator element 11, as shown in Figure 5.
  • the radiating element can be wavy, as shown in FIG is formed, or, as shown in FIG. 8, rectangular meandering.
  • FIG. 7 shows, by way of example, that it goes without saying also the ground plate of the shape of the radiator element can adjust.
  • the multi-band antenna is not 100 percent parallel for metallic EMC shielding of the radio-operated communication terminal runs, but towards the free end towards a larger distance between the antenna and the metallic EMC layer forms. This is shown in Figure 9.
  • FIG. 12 shows a special embodiment of the multi-band antenna according to the present invention, which is characterized is that the radiator element has different heights and has slopes.
  • FIG. 13 shows excerpts of the possible wave shape in the case of a radiator shape as shown in FIG. 1. It can be seen that, in addition to a fundamental frequency with a wavelength of ⁇ 1, three further wavelengths are formed, with ⁇ 4 being a resonance wave between two open ends (corresponds to a microstrip resonance in the original sense).
  • FIG. 14 shows the waveform in the case of a radiator shape as shown in FIG. 2b. It can be seen that, in addition to a fundamental frequency with a wavelength of ⁇ 1, two further wavelengths are formed, with ⁇ 3 being a resonance wave between two open ends (corresponds to a microstrip resonance in the original sense).
  • parts of the antenna structure can also be in other directions, 15 and 16, as in the basic forms be formed. This can be beneficial for the voting options be in individual frequency ranges. Doing so although the principle of a form as compact as possible find, injured, but it may also be the circumstances be better used in the device.
  • Antenna is an inverted-F antenna, due to its dimensions the lowest radiation frequency is determined and by one or more suitable notches along their Longitudinal axis also for radiation in other, higher frequency ranges can be stimulated.
  • the depth and shapes of the Notches can match the desired properties be adapted to the antenna.
  • the antenna works like that Interconnection of two or more planar inverted-F antennas, some parts of the spotlight shared by everything become.
  • the antenna according to the invention requires a feed connection and one or more ground connections, which are shaped arbitrarily can be to adjust possible frequency responses.
  • the connection points for the supply indicated in the drawings and ground connection can and must also be interchanged not necessarily at the edge or a corner of the radiator structure lie.
  • the position for the supply and the ground connection can also lie on other sides or edges of the radiator structure.
  • the antenna according to the invention can be assigned to it own mass plate, as in connection with the figures 3 to 5 has been carried out, or the metallic Parts and surfaces of the radio-operated communication terminal use as a ground plate.
  • the additional ground area can be of any shape and need not must be adapted to the shape of the radiator element.
  • the individual parts of the radiator element can be different Heights, e.g. through cranking or inclines, have opposite the ground surface.
  • the antenna can be used to reduce the length also compressed by suitable vertical structuring be shortened or shortened by suitable folding.
  • the type of folding can be done arbitrarily and can be realized in different technologies. It the radiator element alone can also have the associated ground plane be structured accordingly.
  • this antenna is that part of the radiator length, which determines the lowest frequency, can also be used for radiation at higher frequencies can. This allows the space requirement or the volume requirement be kept small. Since you are at the only base of the Antenna has an impedance of 50 ohms for all frequency ranges is no longer an additional external circuit necessary.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)

Abstract

The antenna includes a planar inverted F-antenna with a feeding point and one or several earth connections. The antenna determines with its size the lower emission frequency and has one or several notches or graduations in its lateral direction. One or several geometrical paths are provided which are composed of straight or bent single paths and which extend from the feeding point to another corner provided by the notches, graduations or form changes. Emitted waves are formed with a higher frequency than the predetermined lower frequency. Preferably, a separated earth plate is allocated to the antenna.

Description

Die vorliegende Erfindung betrifft Antenne für funkbetriebene Kommunikationsendgeräte.The present invention relates to antennas for radio-operated Communication terminals.

Insbesondere in Hinsicht auf die Entwicklung in der Mobilfunktechnologie werden Antennen benötigt, welche in der Lage sind, mehrere Frequenzbänder gleichzeitig abzudecken. Außerdem verlangt der Markt nach immer kleineren und billigeren Mobilfunkgeräten. Deswegen sind Antennen gefordert, die einen geringen Platzbedarf haben, problemlos für eine Funktion in mehreren Frequenzbändern oder einem breitbandigen Frequenzbereich auslegbar und billig herstellbar sind.Especially with regard to the development in mobile radio technology antennas are needed, which are able are to cover several frequency bands at the same time. Moreover the market is asking for smaller and cheaper ones Mobile devices. That is why antennas are required, some have a small footprint, easily for a function in several frequency bands or a broadband frequency range can be designed and manufactured cheaply.

Es sind Lösungen bekannt, bei denen zwei oder mehrere einzelne planare Inverted-F-Antennen in ein Kommunikationsendgerät integriert werden. Dabei sind dann aber mehrere Speisepunkte notwendig, die dann über geeignete Beschaltungen anzusteuern sind, was einen zusätzlichen Aufwand darstellt.Solutions are known in which two or more individual ones planar inverted-F antennas in a communication terminal to get integrated. But then there are several dining points necessary, which can then be controlled via suitable circuits are, which represents an additional effort.

Aufgabe der vorliegenden Erfindung ist es, eine Antenne für funkbetriebene Kommunikationsendgeräte anzugeben, welche als planare Inverted-F-Antenne ausgebildet ist, welche aber in der Lage ist, gleichzeitig mehrere Frequenzbänder abzudecken.The object of the present invention is to provide an antenna for to specify radio-operated communication terminals, which as planar inverted-F antenna is formed, but which in is able to cover several frequency bands at the same time.

Eine Antenne für funkbetriebene Kommunikationsendgeräte zur Lösung der erfindungsgemäßen Aufgabe ist gekennzeichnet durch eine planare Inverted-F-Antenne mit am Speisepunkt und einer oder mehrerer Masseverbindungen, die in ihrer Gesamtabmessung der Antenne bestimmenden Größe für eine vorgegebene untere Abstrahl-Frequenz ausgelegt ist, und die in Längsrichtung eine oder mehrere Einkerbungen oder Abstufungen aufweist, mittels derer sich eine oder mehrere geometrische Strecken ergeben, die sich aus mehreren geradlinigen oder gekrümmten Einzelstrecken zusammensetzen, und die vom Speisepunkt oder einem anderen Eck- oder Endpunkt zu einem der durch die Einkerbungen oder Abstufungen geschaffenen Eckpunkte verlaufen, und über deren Verlauf sich eine abstrahlbare Welle mit einer höheren Frequenz als die vorgegebene untere Frequenz ausbildet.An antenna for radio-operated communication terminals for Solution to the problem according to the invention is characterized by a planar inverted-F antenna with at the feed point and one or several earth connections, in their total dimension the size determining the antenna for a given lower Emission frequency is designed, and the one in the longitudinal direction or has several notches or gradations, by means of which result in one or more geometric lines, which consist of several straight or curved single sections put together, and that from the feed point or one other corner or end point to one of the through the notches or gradations created corner points, and over the course of which an emittable wave with a higher Frequency forms as the predetermined lower frequency.

Die erfindunsgemäße Antenne ist leicht und billig herstellbar, erfordert einen geringen Platzbedarf und ist problemlos für eine Funktion in mehreren Frequenzbändern oder in einem breitbandigen Frequenzbereich auslegbar.The antenna according to the invention is easy and inexpensive to manufacture, requires little space and is easy for a function in several frequency bands or in one broadband frequency range can be designed.

Weitere zweckmäßige Ausgestaltungen der erfindungsgemäßen Antenne ergeben sich aus den Unteransprüchen sowie aus einer nachfolgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnung.Further expedient configurations of the antenna according to the invention result from the subclaims and from a The following description of exemplary embodiments based on the drawing.

In der Zeichnung zeigen

  • Figur 1 eine perspektivische Prinzipdarstellung einer möglichen Ausführungsform einer Antenne gemäß der vorliegenden Erfindung,
  • Figur 2a bis 2k Beispiele für unterschiedliche Ausgestaltungen der Strahlerelemente von weiteren Ausführungsformen einer Antenne gemäß der vorliegenden Erfindung,
  • Figur 3 eine perspektivische Prinzipdarstellung einer möglichen Antenne gemäß der vorliegenden Erfindung mit einer definierten, separaten Masseplatte,
  • Figur 4 eine Draufsicht auf eine mögliche erfindungsgemäße Antenne mit einer unterlegten Masseplatte,
  • Figur 5 eine andere Draufsicht auf eine weitere mögliche erfindungsgemäße Antenne mit einer unterlegten Masseplatte,
  • Figur 6 eine prinzipielle Schnittdarstellung einer verkürzten Antenne gemäß der vorliegenden Erfindung,
  • Figur 7 eine prinzipielle Schnittdarstellung einer anderen verkürzten Antenne gemäß der vorliegenden Erfindung,
  • Figur 8 eine prinzipielle Schnittdarstellung einer weiteren verkürzten Antenne gemäß der vorliegenden Erfindung,
  • Figur 9 bis Figur 11 prinzipielle Anordnungen von erfindungsgemäßen Antennen zur Verbesserung der Abstrahleigenschaften oder zur Anpassung an Gehäuseeigenschaften,
  • Figur 12 eine perspektivische Prinzipdarstellung einer weiteren möglichen Ausführungsform einer Antenne gemäß der vorliegenden Erfindung,
  • Figur 13 prinzipiell den beispielhaften Wellenverlauf bei einer erfindungsgemäßen Antenne nach Figur 1,
  • Figur 14 prinzipiell den beispielhaften Wellenverlauf bei einer erfindungsgemäßen Antenne nach Figur 2b, und
  • Figuren 15 bis 16 prinzipielle Ausführungsformen mit modifizierten Positionen für ein oder mehrere Strukturteile.
    • Show in the drawing
  • FIG. 1 shows a perspective basic illustration of a possible embodiment of an antenna according to the present invention,
  • 2a to 2k examples of different configurations of the radiator elements of further embodiments of an antenna according to the present invention,
  • FIG. 3 shows a perspective basic illustration of a possible antenna according to the present invention with a defined, separate ground plate,
  • FIG. 4 shows a plan view of a possible antenna according to the invention with an underlying ground plate,
  • FIG. 5 shows another top view of another possible antenna according to the invention with an underlying ground plate,
  • FIG. 6 shows a basic sectional illustration of a shortened antenna according to the present invention,
  • FIG. 7 shows a basic sectional illustration of another shortened antenna according to the present invention,
  • FIG. 8 shows a basic sectional illustration of a further shortened antenna according to the present invention,
  • 9 to 11 basic arrangements of antennas according to the invention to improve the radiation properties or to adapt to housing properties,
  • FIG. 12 shows a perspective basic illustration of a further possible embodiment of an antenna according to the present invention,
  • FIG. 13 shows in principle the exemplary waveform in an antenna according to the invention according to FIG. 1,
  • FIG. 14 shows in principle the exemplary waveform for an antenna according to the invention according to FIG. 2b, and
  • Figures 15 to 16 basic embodiments with modified positions for one or more structural parts.

    • Figur 1 zeigt eine prinzipielle perspektivische Ansicht einer möglichen Ausführungsform der erfindungsgemäßen Antenne.Figure 1 shows a basic perspective view of a possible embodiment of the antenna according to the invention.

    Mit 1 ist das eigentliche Strahlerelement der Multibandantenne gemäß der vorliegenden Erfindung gekennzeichnet, wobei es sich hier um eine planare Inverted-F-Antenne handelt. Von dem Mobilfunkgerät 2 ist lediglich ein Teil der Gehäusewand gezeigt, welche mit einer metallischen EMV-Schirmung 3 überzogen ist. Bei der vorliegenden Multibandantenne bildet diese metallische EMV-Schirmung 3 die für das Strahlerelement 1 notwendige Masse.
    Die Verbindung zwischen dem Strahlerelement 1 und der metallischen EMV-Schirmung 3 wird über die Masseverbindung 5 hergestellt. Der eigentliche Speisepunkt der Antenne ist mit 4 gekennzeichnet.    The actual radiating element of the multiband antenna according to the present invention is identified by 1, which is a planar inverted-F antenna. Only part of the housing wall of the mobile radio device 2 is shown, which is covered with a metallic EMC shield 3. In the present multiband antenna, this metallic EMC shield 3 forms the mass necessary for the radiator element 1.
    The connection between the radiator element 1 and the metallic EMC shield 3 is established via the ground connection 5. The actual feed point of the antenna is marked with 4.

    Auf eine genaue Erklärung der Funktionsweise der hier geschilderten planaren Inverted-F-Antenne soll nicht näher eingegangen werden, da diese für den auf diesem Gebiet tätigen Fachmann selbstverständlich ist. Es sei aber in diesem Zusammenhang z.B. verwiesen auf MICROSTRIP ANTENNA THEORY AND DESIGN; J. R. James, P. S. Hall, C. Wood; Verlag Peter Peregrinus Ltd., Stevenage/UK and New York, 1981.For a precise explanation of how it works planar inverted-F antenna should not be discussed in more detail as they work for those in the field Expert is self-evident. But it is in this context e.g. referenced MICROSTRIP ANTENNA THEORY AND DESIGN; J.R. James, P.S. Hall, C. Wood; Publisher Peter Peregrinus Ltd., Stevenage / UK and New York, 1981.

    Aufgrund der zwei in dem Strahlerelement 1 von Figur 1 vorgenommenen Einkerbungen ergeben sich neben der vorgegebenen unteren Frequenz mehrere höhere Frequenzen. Der genaue Verlauf für einen Teil der sich auf dem Strahlerelement 1 ausbildenden Wellen ergibt sich aus Figur 14.Because of the two made in the radiator element 1 of Figure 1 Notches result in addition to the given lower one Frequency several higher frequencies. The exact course for a part of those forming on the radiator element 1 Waves result from Figure 14.

    Die Figuren 2a bis 2k zeigen eine kleine beispielhafte Auswahl von unterschiedlich gestalteten Strahlerelementen. Diese Auswahl ist keinesfalls beschränkend. Bei allen dargestellten Beispielen handelt es sich im Grundsatz um eine planare Inverted-F-Antenne gemäß dem Patentanspruch 1.Figures 2a to 2k show a small sample selection of differently designed radiator elements. This Selection is by no means restrictive. With all shown Examples are basically a planar inverted-F antenna according to claim 1.

    Figur 3 zeigt ein Ausführungsbeispiel einer erfindungsgemäßen Multibandantenne, bei welcher im Gegensatz zu der in Figur 1 dargestellten Multibandantenne eine zusätzliche separate Masseplatte 6 vorgesehen ist. Da unter normalen Umständen die Masseverhältnisse innerhalb eines funkbetriebenen Kommunikationsendgerätes nicht immer voll abschätzbar sind, sorgt die Masseplatte 6 für definierte Masseverhältnisse in Bezug auf das Strahlerelement 1 der Multibandantenne. Zwischen der Masseplatte 6 und der Gerätemasse sind eine oder mehrere Verbindungen 7 vorgesehen. Diese Verbindungen können auch flächenhaft ausgeführt sein. Figure 3 shows an embodiment of an inventive Multi-band antenna, in which, in contrast to that in FIG. 1 Multiband antenna shown an additional separate ground plate 6 is provided. Because under normal circumstances Mass ratios within a radio-operated communication terminal are not always fully predictable Mass plate 6 for defined mass ratios with respect to the radiator element 1 of the multi-band antenna. Between the ground plate 6 and the device ground are one or more connections 7 provided. These connections can also be extensive be executed.

    Die Masseplatte 8 muß sich nicht, wie in Figur 4 gezeigt ist, bezüglich ihrer Abmessungen nach den Abmessungen des Strahlerelementes 9 richten.The ground plate 8 need not, as shown in Figure 4, with regard to their dimensions according to the dimensions of the radiator element 9 straighten.

    Jedoch ist es auch möglich, die Masseplatte 10 in ihren äußeren Abmessungen dem jeweiligen Strahlerelement 11 anzupassen, wie in Figur 5 dargestellt ist.However, it is also possible to have the ground plate 10 in its outer Adapt dimensions to the respective radiator element 11, as shown in Figure 5.

    Zur Verkürzung der Einbaulänge der erfindungsgemäßen Antenne kann das Strahlerelement wellenförmig, wie in Figur 6 gezeigt ist, ausgebildet sein, oder, wie in Figur 8 gezeigt ist, rechteckförmig meanderförmig.To shorten the installation length of the antenna according to the invention the radiating element can be wavy, as shown in FIG is formed, or, as shown in FIG. 8, rectangular meandering.

    In Figur 7 ist beispielshaft dargestellt, daß sich selbstverständlich auch die Masseplatte der Form des Strahlerelements anpassen kann.FIG. 7 shows, by way of example, that it goes without saying also the ground plate of the shape of the radiator element can adjust.

    Zur Verbesserung der Abstrahleigenschaften und der Bandbreitenerhöhung kann vorgesehen sein, daß die Ebene des Strahlerelements der Multibandantenne nicht hundertprozentig parallel zur metallischen EMV-Schirmung des funkbetriebenen Kommunikationsendgerätes verläuft, sondern sich zum freien Ende hin ein größerer Abstand zwischen der Antenne und der metallischen EMV-Schicht bildet. Dies ist in Figur 9 dargestellt.To improve the radiation properties and increase the bandwidth can be provided that the plane of the radiator element the multi-band antenna is not 100 percent parallel for metallic EMC shielding of the radio-operated communication terminal runs, but towards the free end towards a larger distance between the antenna and the metallic EMC layer forms. This is shown in Figure 9.

    Die gleiche Problematik ist in Figur 10 dargestellt, wobei davon ausgegangen wird, daß sich normalerweise die Ebene des Strahlerelements der Multibandantenne dem Gehäuseverlauf anpaßt - in Figur 10 gestrichelt dargestellt -, aber um die Abstrahleigenschaften zu verbessern, geradlinig weitergeführt werden kann.The same problem is shown in Figure 10, wherein it is assumed that the level of the Radiator element of the multi-band antenna adapts to the course of the housing - shown in dashed lines in Figure 10 -, but about the radiation properties to improve, continued in a straight line can be.

    Eine weitere Möglichkeit zu Verbesserung der Abstrahleigenschaften der Antenne ist prinzipiell in Figur 11 dargestellt.Another way to improve the radiation properties the antenna is shown in principle in Figure 11.

    Figur 12 zeigt eine besondere Ausführungsform der Multibandantenne gemäß der vorliegenden Erfindung, welche dadurch gekennzeichnet ist, daß das Strahlerelement verschiedene Höhen und Steigungen aufweist.FIG. 12 shows a special embodiment of the multi-band antenna according to the present invention, which is characterized is that the radiator element has different heights and has slopes.

    Figur 13 zeigt auszugsweise den möglichen Wellenverlauf bei einer Strahlerform, wie sie in Figur 1 dargestellt ist. Es ist zu erkennen, daß sich neben einer Grundfrequenz mit einer Wellenlänge von λ1 drei weitere Wellenlängen ausbilden, wobei es sich bei λ4 um eine Resonanzwelle zwischen zwei offenen Enden (entspricht einer Microstrip-Resonanz im ursprünglichen Sinne) handelt.FIG. 13 shows excerpts of the possible wave shape in the case of a radiator shape as shown in FIG. 1. It can be seen that, in addition to a fundamental frequency with a wavelength of λ 1, three further wavelengths are formed, with λ 4 being a resonance wave between two open ends (corresponds to a microstrip resonance in the original sense).

    Figur 14 zeigt den Wellenverlauf bei einer Strahlerform, wie sie in Figur 2b dargestellt ist. Es ist zu erkennen, daß sich neben einer Grundfrequenz mit einer Wellenlänge von λ1 zwei weitere Wellenlängen ausbilden, wobei es sich bei λ3 um eine Resonanzwelle zwischen zwei offenen Enden (entspricht einer Microstrip-Resonanz im ursprünglichen Sinne) handelt.FIG. 14 shows the waveform in the case of a radiator shape as shown in FIG. 2b. It can be seen that, in addition to a fundamental frequency with a wavelength of λ 1, two further wavelengths are formed, with λ 3 being a resonance wave between two open ends (corresponds to a microstrip resonance in the original sense).

    Weiter können Teile der Antennenstruktur auch in andere Richtungen, gemäß Fig. 15 und Fig. 16, als bei den Grundformen ausgeformt sein. Dieses kann vorteilhaft für die Abstimm-Möglichkeiten in einzelnen Frequenzbereichen sein. Dabei wird zwar der Grundsatz, eine möglichst räumlich gedrängte Form zu finden, verletzt, es können damit aber auch eventuell die Gegebenheiten im Gerät besser genutzt werden.Furthermore, parts of the antenna structure can also be in other directions, 15 and 16, as in the basic forms be formed. This can be beneficial for the voting options be in individual frequency ranges. Doing so although the principle of a form as compact as possible find, injured, but it may also be the circumstances be better used in the device.

    Zusammenhängend ist festzustellen, daß die erfindungsgemäße Antenne eine Inverted-F-Antenne ist, bei der durch ihre Abmessungen die niedrigste Strahlungsfrequenz bestimmt wird und die durch ein oder mehrere geeignete Einkerbungen entlang ihrer Längsachse auch zur Strahlung in anderen, höheren Frequenzbereichen angeregt werden kann. Die Tiefe und Formen der Einkerbungen können dabei an die gewünschten Eigenschaften der Antenne angepaßt werden. Die Antenne wirkt so, wie die Aneinanderschaltung zweier oder mehrerer planarer Inverted-F-Antennen, wobei manche Strahlerteile von allem gemeinsam genutzt werden. In context, it should be noted that the invention Antenna is an inverted-F antenna, due to its dimensions the lowest radiation frequency is determined and by one or more suitable notches along their Longitudinal axis also for radiation in other, higher frequency ranges can be stimulated. The depth and shapes of the Notches can match the desired properties be adapted to the antenna. The antenna works like that Interconnection of two or more planar inverted-F antennas, some parts of the spotlight shared by everything become.

    Durch Querresonanzen zwischen den verschiedenen Strahlerteilen kann es auch zu Abstrahlungen wie bei Mikrostripantennen (Halbwellenresonanz) kommen.Through cross-resonance between the different radiator parts there may also be radiation like microstrip antennas (Half-wave resonance) come.

    Die erfindungsgemäße Antenne benötigt eine Speiseverbindung und eine oder mehrere Masseanbindungen, die beliebig ausgeformt sein können, um evtl. Frequenzgänge einzustellen. Die in den Zeichnungen angegebenen Anschlußpunkte für die Speisung und Masseanbindung können auch vertauscht sein und müssen nicht zwingend am Rand oder einer Ecke der Strahlerstruktur liegen.The antenna according to the invention requires a feed connection and one or more ground connections, which are shaped arbitrarily can be to adjust possible frequency responses. The connection points for the supply indicated in the drawings and ground connection can and must also be interchanged not necessarily at the edge or a corner of the radiator structure lie.

    Die Position für die Speisung und die Masseverbindung können auch an anderen Seiten oder Kanten der Strahlerstruktur liegen. Die erfindungsgemäße Antenne kann eine ihr zugeordnete eigene Masseplatte besitzen, wie im Zusammenhang mit den Figuren 3 bis 5 ausgeführt worden ist, oder aber die metallischen Teile und Flächen des funkbetriebenen Kommunikationsendgerätes als Masseplatte benutzen. Die zusätzliche Massefläche kann dabei beliebig ausgeformt sein und muß nicht zwingend an die Form des Strahlerelements angepaßt sein.The position for the supply and the ground connection can also lie on other sides or edges of the radiator structure. The antenna according to the invention can be assigned to it own mass plate, as in connection with the figures 3 to 5 has been carried out, or the metallic Parts and surfaces of the radio-operated communication terminal use as a ground plate. The additional ground area can be of any shape and need not must be adapted to the shape of the radiator element.

    Die einzelnen Teile des Strahlerelementes können unterschiedliche Höhen, hervorgerufen z.B. durch Kröpfung oder Steigungen, gegenüber der Massefläche aufweisen.The individual parts of the radiator element can be different Heights, e.g. through cranking or inclines, have opposite the ground surface.

    Zur Verringerung der Abmessung in Längsrichtung kann die Antenne auch durch geeignete vertikale Strukturierung gestaucht werden oder durch eine geeignete Faltung verkürzt werden. Die Art der Faltung kann dabei beliebig ausgeführt werden und kann in unterschiedlichen Technologien realisiert werden. Es kann das Strahlerelement allein aber auch die zugehörige Massefläche entsprechend strukturiert sein.The antenna can be used to reduce the length also compressed by suitable vertical structuring be shortened or shortened by suitable folding. The The type of folding can be done arbitrarily and can be realized in different technologies. It the radiator element alone can also have the associated ground plane be structured accordingly.

    Durch entsprechende Ausformung der einzelnen Strahlerelemente, wie z.B. Stufung, Schlitze, Taperung, Veränderung der Strahlerhöhe über der Massefläche, können die Abstrahleigenschaften weiter verändert bzw. verbessert werden oder die Antenne an die Geometrie des Gehäuses angepaßt werden.By appropriate shaping of the individual radiator elements, such as. Gradation, slits, tapering, change of Spotlight height above the ground surface can affect the radiation properties further changed or improved or the antenna can be adapted to the geometry of the housing.

    Weiterhin soll zusammenfassend festgestellt werden, daß der Vorteil dieser Antenne darin liegt, daß ein Teil der Strahlerlänge, die für die niedrigste Frequenz bestimmend ist, auch für die Abstrahlung bei höheren Frequenzen benutzt werden kann. Dadurch kann der Flächenbedarf bzw. der Volumenbedarf kleingehalten werden. Da man am einzigen Fußpunkt der Antenne eine Impedanz von 50 Ohm für alle Frequenzbereiche einstellen kann, ist keine weitere äußere Beschaltung mehr nötig.Furthermore, it should be summarized that the The advantage of this antenna is that part of the radiator length, which determines the lowest frequency, can also be used for radiation at higher frequencies can. This allows the space requirement or the volume requirement be kept small. Since you are at the only base of the Antenna has an impedance of 50 ohms for all frequency ranges is no longer an additional external circuit necessary.

    Da bei dieser Antenne je nach Frequenzbereich unterschiedliche Teile zur Strahlung beitragen, werden bei einer versehentlichen teilweisen Abdeckung der Antenne mit der Hand nicht alle Frequenzbereiche gleichermaßen gestört. Eine bestehende Gesprächsverbindung kann folglich gegebenenfalls in einem ungestörten Frequenzbereich aufrechterhalten werden.Because with this antenna different depending on the frequency range Parts contributing to the radiation are inadvertent partial coverage of the antenna by hand not all frequency ranges are equally disturbed. An existing one Call connection can therefore possibly be in an undisturbed frequency range can be maintained.

    Claims (14)

    Antenne für funkbetriebene Kommunikationsendgeräte, gekennzeichnet durch eine planare Inverted-F-Antenne mit einem Speisepunkt und einer oder mehrerer Masseverbindungen, die in ihrer die Gesamtabmessung der Antenne bestimmenden Größe für eine vorgegebene untere Abstrahl-Frequenz ausgelegt ist, und die in Längsrichtung eine oder mehrere Einkerbungen oder Abstufungen aufweist, mittels derer sich eine oder mehrere geometrische Strecken ergeben, die sich aus mehreren geradlinigen oder gekrümmten Einzelstrecken zusammensetzen, und die vom Speisepunkt oder einem anderen Eck- oder Endpunkt zu einem der durch die Einkerbungen, Abstufungen oder Formänderungen geschaffenen Eckpunkte verlaufen, und über deren Verlauf sich abstrahlbare Wellen mit einer höheren Frequenz als die vorgegebene untere Frequenz ausbilden.Antenna for radio-operated communication terminals, characterized by a planar inverted-F antenna with a Feeding point and one or more ground connections, those that determine the overall dimension of the antenna Size designed for a predetermined lower radiation frequency and one or more notches in the longitudinal direction or gradations, by means of which one or more Geometric lines result from several straight lines or curved single sections, and from the feed point or another corner or end point one of the notches, gradations or shape changes created corner points run, and their course emitted waves with a higher frequency than form the predetermined lower frequency. Antenne nach Anspruch 1, dadurch gekennzeichnet, daß der Antenne eine separate Masseplatte zugeordnet ist, die in Form und Größe unterschiedlich sein kann.Antenna according to claim 1, characterized in that the Antenna is assigned a separate ground plate, which is in the form and size can be different. Antenne nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß einzelne Teile der Strahlerelemente der Antenne unterschiedliche Höhen oder Steigungen aufweisen.Antenna according to claim 1 or 2, characterized in that individual parts of the antenna antenna elements are different Have heights or slopes. Antenne nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Antenne in ihrer Längsrichtung bzw. ihrer Querrichtung durch geeignete vertikale Strukturierung in horizontaler Richtung gestaucht ist.Antenna according to claim 1 to 3, characterized in that the antenna in its longitudinal direction or its transverse direction through suitable vertical structuring in horizontal Direction is compressed. Antenne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Antenne in der Gehäusewand integriert ist.Antenna according to one of the preceding claims, characterized characterized in that the antenna is integrated in the housing wall is. Antenne nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Position und die Art von ein oder mehrerer Masseverbindungen zwischen Strahlerelement und Massefläche an die gewünschten Antenneneigenschaften angepaßt werden.Antenna according to one of claims 1 to 5, characterized in that that the position and type of one or more Earth connections between the radiator element and earth surface can be adapted to the desired antenna properties. Antenne nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Position und die Art der Speiseverbindung zum Strahlerelement an die gewünschten Antenneneigenschaften angepaßt werden.Antenna according to one of claims 1 to 5, characterized in that that the position and type of feed connection to the antenna element to the desired antenna properties be adjusted. Antenne nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Position und die Art von einer oder mehreren Masseverbindungen zwischen einer definierten separaten Massefläche und der Massefläche des Gerätes an die gewünschten Antenneneigenschaften angepaßt werden.Antenna according to one of claims 1 to 5, characterized in that that the position and type of one or multiple ground connections between a defined separate Ground surface and the ground surface of the device to the desired Antenna properties can be adjusted. Antenne nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Positionen der Speiseverbindung sowie der Masseverbindungen zur wirksamen Antennenmasse vertauscht sind.Antenna according to one of claims 1 to 5, characterized in that that the positions of the feed connection as well the ground connections swapped to the effective antenna ground are. Antenne nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Speiseverbindung sowie der Masseverbindungen an beliebigen Positionen auf dem Strahlerelement kontaktieren.Antenna according to one of claims 1 to 5, characterized in that that the feed connection as well as the ground connections contact at any position on the emitter element. Antenne nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Speiseverbindung sowie die Masseverbindungen nicht geradlinig verlaufen.Antenna according to one of claims 1 to 5, characterized in that that the feed connection as well as the ground connections not straight. Antenne nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß einzelne Teile des Strahlerelementes derart ausgeformt sind, daß sie in beliebige Richtung weisen.Antenna according to one of claims 1 to 5, characterized in that that individual parts of the radiator element such are formed so that they point in any direction. Antenne nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Strahlerstruktur in mehrere Teilelemente aufgeteilt ist, die durch geeignete Verkopplung wieder die gewünschte Antennenfunktion erfüllt. Antenna according to one of claims 1 to 5, characterized in that that the radiator structure in several sub-elements is divided again by suitable coupling fulfills the desired antenna function. Antenne nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß einzelne Teile der Strahlerelemente der Antenne in der Horizontalebene beliebig gekrümmt oder gefaltet sind.Antenna according to claim 1 or 2, characterized in that individual parts of the antenna elements in the antenna Horizontal plane are arbitrarily curved or folded.
    EP00100923A 1999-01-26 2000-01-18 Antenna for wireless operated communication terminals Ceased EP1026774A3 (en)

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    EP1026774A3 (en) 2000-08-30
    US6483462B2 (en) 2002-11-19

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